linux-kernel - Re: [BUG] kvm: guest can not startup due to triple fault

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Message-ID: <a4d1e098-7b9b-43f8-b341-2e0dbf1db780@email.android.com>
Date:	Tue, 19 Oct 2010 07:56:07 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Avi Kivity <avi@...hat.com>, Dave Young <hidave.darkstar@...il.com>
CC:	Ingo Molnar <mingo@...e.hu>, Jan Kiszka <jan.kiszka@....de>,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [BUG] kvm: guest can not startup due to triple fault

Right... note in particular that the BIOS sets them up inconsistently.  The kernel is doing the rufht thing: since NX isn't available on all processors it is considered unavailable.

"Avi Kivity" <avi@...hat.com> wrote:

>  On 10/19/2010 08:55 AM, Dave Young wrote:
>> >  OK.  Please install msr-tools on your system, and give us the outputs of:
>> >
>> >  rdmsr -p 0 -xc 0x1a0
>> 0x1764952489
>>
>> >  rdmsr -p 1 -xc 0x1a0
>> 0x1364952489
>>
>
>That's MSR_IA32_MISC_ENABLE_XD_DISABLE.  Looks like the kernel never 
>plays with it.
>
>Suggest:
>- updating your BIOS
>- playing with the NX feature in your BIOS setup screens
>
>
>-- 
>error compiling committee.c: too many arguments to function
>

-- 
Sent from my mobile phone.  Please pardon any lack of formatting.
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